This is very true. Just doing a reverse image search on google (with a photo of somebody) can result in finding all sorts of details. Once you have their faceb

This is very true. Just doing a reverse image search on google (with a photo of somebody) can result in finding all sorts of details. Once you have their facebook you have their name, with a name you can find their linkedin, from there its a wash. You can call past and present employers, locations, family, friends. If somebody doesn't lock down their facebook page its even worse you can literally see all their photos. Try googleing yourself and close friends, see how much you can learn without doing anything at all invasive or spending money. You'll quickly learn the importance of minimizing your online appearance after this.